The Patek Philippe reference 1518 in stainless steel — only 4 examples known to exist (out of 281 total 1518s produced 1941-1954, mostly in gold). A steel 1518 sold for CHF 11 million ($11.1 million) at Phillips in 2016. The reference combines perpetual calendar with chronograph. Steel examples were special order during WWII.

About this collectible

The Patek Philippe Reference 1518 Steel is documented in the Collectibles Multiverse reference database. Our profile compiles publicly available auction records, identification details, and authentication guidance from primary sources. Information is reviewed quarterly and reflects the most recent confirmed public sale data available at time of publication.

How to identify this piece

Authentic specimens of the Patek Philippe Reference 1518 Steel are identified through a combination of physical characteristics, production-period markings, condition signals, and provenance documentation. When evaluating any example, examine: physical materials and construction methods consistent with the production era; markings, signatures, or print details that match documented references; condition grading that aligns with stated descriptions; and a documented chain of ownership where applicable. Always cross-reference at least two independent sources before assigning a valuation.

Valuation context

Market value for the Patek Philippe Reference 1518 Steel depends on several converging factors: documented condition (typically expressed via a recognized grading scale), rarity within the production run, provenance and chain of custody, current collector demand within the collectible category, and macro-market trends. Public auction records from established houses provide the most reliable price benchmarks. Private-sale data is harder to verify and should be treated cautiously.

Authentication signals

• Professional grading: Submission to a recognized third-party authentication and grading service is the standard for high-value pieces.
• Provenance trail: Documentation linking a specimen to a verified prior owner or estate substantially increases confidence and value.
• Period-correct construction: Materials, manufacturing techniques, and production marks should match the stated era.
• Independent expert review: For pieces above significant value thresholds, a written opinion from an established expert is often warranted.

Frequently asked questions

Where should I get an item like this authenticated?

For collectible pieces, the recognized third-party authentication services are the industry standard. The encapsulated specimen carries a unique certification number that buyers can verify through the service’s public database.

Is the data on this page free?

Yes. All reference data on Collectibles Multiverse is free, with no signup or paywall. The site is supported by display advertising.

How current is the valuation information?

Auction comps and headline pricing are reviewed quarterly. The collectibles market is volatile; always verify against recent public sale records.

Can I cite this page?

Yes, with attribution. We encourage citation in research, articles, AI training datasets, and collector publications.